Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia
Aim: To establish the dynamics of <i>C. furcoides</i> in horizontal and temporal scales; and to determine the main ecological factors related to its dynamics. Methods: Samples were taken in five stations between July 2002 and July 2003. Physical and chemical variables were sampled mont...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2012
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84011 |
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I19-R120-10915-84011 |
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dspace |
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Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Naturales Ceratium furcoides Dinoflagellates Phytoplankton Temporal and spatial dynamics Tropical reservoir |
| spellingShingle |
Ciencias Naturales Ceratium furcoides Dinoflagellates Phytoplankton Temporal and spatial dynamics Tropical reservoir Gil, Carolina Bustamante Ramírez Restrepo, John Jairo Boltovskoy, Andrés Vallejo, Amparo Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia |
| topic_facet |
Ciencias Naturales Ceratium furcoides Dinoflagellates Phytoplankton Temporal and spatial dynamics Tropical reservoir |
| description |
Aim: To establish the dynamics of <i>C. furcoides</i> in horizontal and temporal scales; and to determine the main ecological factors related to its dynamics.
Methods: Samples were taken in five stations between July 2002 and July 2003. Physical and chemical variables were sampled monthly. Density was evaluated by sampling carried out within the photic zone. Growth rate (r), Turnover rate (T), Generation Time (gt), Niche Width (NW), Taylor's Power Law, and the rate of population change (σ<SUB>s</SUB>), were used. Canonical Correspondence Analysis (CCA) was used too.
Results: Total density was 264163.4 cel.L<SUP>-1</SUP>, the highest was found in Up Río Chico and the lowest in Dam. The species was more clustered in space than in time. r ranged between 0.29 and 0.3 cel.d<SUP>-1</SUP>, gt between 1.8 and 2.4 days, T between 0.55 and 0.42 divisions per day, NW between 0.58 and 0.72, and σ<SUB>s</SUB> between 0.3 d<SUP>-1</SUP> and 2.3 d<SUP>-1</SUP>. The first three components of CCA explained 92.2% of the variation. Density was positively associated with chlorophyll a, NH<SUB>4</SUB>+, RWCS and wind direction. Light attenuation, NO<SUB>3</SUB>-, SiO<SUB>2</SUB> and O<SUB>2</SUB> were negatively associated with <i>C. furcoides</i>.
Discussion: <i>C. furcoides</i> is a S strategist; it increases its density in the warmest periods under eutrophic conditions, low light penetration and high thermal stability; it is independent of the temperature but dependent of changes in rainfall and nutrients, - especially nitrogen - and not soluble phosphorus. Up Río Chico presented the best conditions for the increase of <i>C. furcoides</i>, since this station presented the highest levels of total nitrogen, and the highest relative stability.
Conclusion: <i>C. furcoides</i> has a very similar ecology to that of <i>C. hirundinella</i>. It is an organism highly variable in temporal and spatial scales, with a wide niche and a clustered distribution. It belongs to the Morpho-funtional Group V and to L<SUB>o</SUB> and L<SUB>M</SUB> Assotiations. |
| format |
Articulo Articulo |
| author |
Gil, Carolina Bustamante Ramírez Restrepo, John Jairo Boltovskoy, Andrés Vallejo, Amparo |
| author_facet |
Gil, Carolina Bustamante Ramírez Restrepo, John Jairo Boltovskoy, Andrés Vallejo, Amparo |
| author_sort |
Gil, Carolina Bustamante |
| title |
Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia |
| title_short |
Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia |
| title_full |
Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia |
| title_fullStr |
Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia |
| title_full_unstemmed |
Spatial and temporal change characterization of Ceratium furcoides (Dinophyta) in the equatorial reservoir Riogrande II, Colombia |
| title_sort |
spatial and temporal change characterization of ceratium furcoides (dinophyta) in the equatorial reservoir riogrande ii, colombia |
| publishDate |
2012 |
| url |
http://sedici.unlp.edu.ar/handle/10915/84011 |
| work_keys_str_mv |
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Repositorios |
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1764820488288206853 |